. 2016 Sep 6;68(10):1530–1537. doi: 10.1002/acr.22844

Table 3.

Discriminant validity of the Gout Activity Scores (GAS), and single items: SMD between patients defined as active or inactive according to internal and external constructs^a

Variable

Disease activity criterion

VAS physician (≤4 vs. >4)

Patient‐reported remission (GIS item)

GAS_3‐step‐a

1.18^b

1.26^b

1.00^b

GAS_3‐step‐b

1.18^b

1.25^b

0.99^b

GAS_3‐step‐c

1.12^b

1.22^b

1.03^b

GAS_1‐step‐a

1.18^b

1.25^b

0.92^b

GAS_1‐step‐b

1.18^b

1.24^b

0.92^b

GAS_1‐step‐c

1.12^b

1.23^b

1.03^b

12‐month attacks

0.58^b

0.69^b

0.80^b

\sqrt{sUA}

0.49^c

0.57^c

0.70^c

VAS pain

1.00^b

0.92^b

0.55^c

VAS patient global

0.97^b

1.16^b

0.77^b

\sqrt{TJC}

0.84^b

0.77^b

0.27

\sqrt{SJC}

0.75^b

0.77^b

0.17

ln(1 + tophi dimension)

0.49^c

0.37^d

0.33

ln(1 + tophi number)

0.48^c

0.30

0.26

SMD = standardized mean difference; VAS = visual analog scale; GIS = Gout Impact Scale; sUA = serum uric acid; TJC = tender joint count; SJC = swollen joint count.

P ≤ 0.001.

P ≤ 0.01.

P ≤ 0.05.